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Digital potentiometer offers one-time programmability

Santa Clara, Calif.—Catalyst Semiconductor Inc. has added a 32-tap device to its family of digitally programmable potentiometers (DPP). The CAT5126 32-tap digital potentiometer is being offered as an alternative to mechanical potentiometers in applications where one-time calibration is required.

The CAT5126 offers one-time wiper programmability via a two-wire serial interface, which enables system designers to set the wiper's value after power-on and also disable the interface to prevent further adjustments. The device also offers the flexibility of not disabling the interface, in which case the system will always 'power-on' to the programmed wiper position. In this mode, users can change the wiper position as necessary for the specific session and the modified value will not be stored.

The CAT5126 digital programmable potentiometer offers end-to-end resistance values of 10k ohms, 50k ohms, and 100k ohms and is suitable for LCD screen adjustment; automated calibration; contrast, brightness and volume control; programmable analog functions; line impedance matching and mechanical potentiometer replacement in handheld and other space-constrained applications.

The CAT5126 digital potentiometer comes in 8-lead TDFN (2mm x 3mm) and 8-lead MSOP packages and is a pin-for-pin replacement for Maxim's MAX5427 (100k ohms), MAX5428 (50k ohms) and MAX5429 (10k ohms) digital potentiometers.

Pricing: $0.53 each in 10,000 piece quantities.
Availability: Samples are now available with projected lead-time for production quantities at 6 to 8 weeks ARO.

Data Sheet: click here

Catalyst Semiconductor Inc., 1-408-542-1080, www.catsemi.com

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